The volume of a cone with height equal to radius, and slant height 5 cm is :

A

$$\frac{125\pi}{12\sqrt{3}} cm^{3}$$

B

$$\frac{125\pi}{6\sqrt{3}} cm^{3}$$

C

$$\frac{125\pi}{12\sqrt{2}} cm^{3}$$

D

$$\frac{125\pi}{6\sqrt{2}} cm^{3}$$